Technical Desktops


735/125 with Monitor

700 Series Selection:

Name: 735
Product Number: A4053A
Introduced: 1992
Division: Workstation Systems
Original Price: $29995
Catalog Reference: Does not appear

Description:

The 735 had the same form factor as the original 720. There were two models in the 735 range. The 735/99 ($29,995) featured the PA-7100 running at 99 MHz; the 735/125 incorporated the PA-7150 running at 125 MHz.

These computers were large (and heavy) and offered a great deal of expandability. They could hold up to 784 MB of RAM. A rear-removable tray held two hard disc drives.

Collectors notes: We have seen 100% of the 9000/700 series units we have in the collection need a new AC receptacle/filter when they are powered up after a long time of not being used. The metalized capacitors inside these filters break down and produce a combination of magic smoke and a sticky fluid - usually within 30 mins of AC being connected - and will often trip an earth leakage circuit breaker in your AC supply due to the filter breakdown (note that the fuse in the unit does NOT protect against this failure).

Once the receptacle is replaced (SCHAFFNER FN9222R-10-06 IEC Filter), it's likely that some or all of the electrolytic capacitors in the power supply will need to be replaced. The supply in the 735/125s we have in the collection are from a different manufacturer than the ones in the 720/730 series and have fewer capacitors but in one case a 39uf 35v capacitor on the control board inside the supply was dried up, stopping the supply from starting. All the other caps checked out OK but could be replaced as a precaution.

Also be prepared for any of the tantalum 33uf 16V capacitors on the PC boards to burn out as well - easily replaced and if caught before they burn too much, will not do any damage to the unit. This has only been seen once in one unit on the EISA card adaptor next to the power supply so hopefully is unlikely to happen in general.

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